Key holder



FIG. 1 is a front elevational view of a key holder showing my new design;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a right side elevational view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a bottom plan view thereof.

The broken line showing of key rings in FIG. 1 is for illustrative purposes and forms no part of the claimed design. 

The ornamental design for a key holder, as shown and described. 